       function setcookie(name,value){
		    var Days = 30;
		    var exp  = new Date();
		    exp.setTime(exp.getTime() + Days*24*60*60*1000);
		    document.cookie = name + "="+ escape (value) + ";expires=" + exp.toGMTString();
		}

		function getcookie(name){
		    var arr = document.cookie.match(new RegExp("(^| )"+name+"=([^;]*)(;|$)")); 
		    if(arr != null){
		        return unescape(arr[2]);
		    }else{
		        return "";
		    }
		}

		function delcookie(name){
		    var exp = new Date(); 
		    exp.setTime(exp.getTime() - 1);
		    var cval=getCookie(name);
		    if(cval!=null) document.cookie= name + "="+cval+";expires="+exp.toGMTString();
		}